I have just recently brought the better half a V 1999 focus LX 5 door, the past few days the central locking has been playing up. When you press the lock button on the fob it sounds like the car locks but instantly unlocks, it works when you use the key in the lock then all doors lock/unlock, not sure where to start as this is the first Ford we have had?

Just been and put my ear by every door and pressed the lock button, every door except the drivers door you could hear the motor trying to lock. Also you can unlock all doors except the drivers when you press the button.